Bag turning machine



June 22, J. J, NEUMAN ET AL 2,084,498

BAG TURNING MACHINE Filed July 24, 1955 `z sheets-sheet 1 Gttorneg June 22, 1937.

J. J. NEUMAN ET AL BAG TURNING MACHINE Filed July 24, 1935 3 Sheets-Sheet 2 Brwentor Gttor eg June 22, 1937. v J. J. NEUMAN ET AL 2,084,498

BAG TURNING MACHINE Filed July 24, 1935 5 Sheets-Sheet 3 Humm l.

Bmaentor 34, f a .SACOEBMELSMMS sg aemx maar: e

Gt meg Patented June 22, 1937 PATENT OFFICE BAG TURNING MACHINE Jacob John Neuman, South Salem, and Gerald R. Greene, Jackson Heights, N. Y.

Application July 24, 1935, Serial No.` 32,830

6 Claims.

The present invention relates to bag turning machines.

Heretofore in the use of bag turning machines it has been customary to turn the bags inside out, remove them from the turning machine and to subsequently subject the bags to a brushing or cleaning device separate and independent from the bag turning machine.

.An object of this invention is to combine in a 10 bag turning machine peculiarly disposed and operated brushes adapted to work against the outturned inner side of the bag to not only effectively remove sugar or other materials which may adhere to the fabric but to also utilize these brushes l5 iny the action of the bag turning machine for more sufficiently and positively turning the bag completely from end to end inside out and to condition the bag for proper travel through the fee-d rolls and in flat condition out of the bag turning 29- machine.

Another object of this invention is to provide feedr-olls in the bag turning machine which cooperate with the brushes and which are of a peculiar construction for yieldingly grasping the bag with- 2'5 out injury thereto andfor effecting the desired and continuous feeding operation irrespective of the thicknesses of the bag, the meeting of seams and exterior thicknesses in the bag structure, and for also ypreventing injury to the bag as it is re- 30 moved by the rollers from the bag supporting and overturning arms.

A-particular feature of the invention in connection with the feed rolls is the provision of a rubber surface on the rolls for yieldingly gripping the'bags and stripping them from the supporting arms so that the-arms may be advanced -into the j throat between the rolls without danger of pinching and cutting and tearing of the bags as the rolls strip the Abags from the arms.

40 4Another important feature of the present invention is an improved drive means including an endless chain with a peculiar arrangement of sprocket wheels and idler wheels -on and between the brushes and the feed rolls for effecting a continuous and uniform turning of the brushes and the feed rolls irrespective of face adjustment necessary between the pairs of brushes and feed rolls as the bags and supporting arms pass therebetween. n

With .the foregoing and other objects in view,

the invention will lbe more fully described herelnaftenand will be more particularly pointed out in the claims appended hereto.

In the drawings, whereiniike symbols refer to like or corresponding parts throughout the several views.

Figure 1 is a side elevation, partly broken away, of a bag turning machine embodying the novel features of the present invention.

Figure 2 is a top plan view of the same.

Figure 3 is an enlarged fragmentary sectional view taken through the brushes and feed rolls with the adjacent parts of the machine and showing an inverted bag passing through the brushes.

Figure 4 is a similar view showing the inverted bag about to enter between the feed rolls, the dotted lines showing the bag stripped from the carrying arms.

Figure 5 is a detail sectional View taken lengthwise through one of the brushes, and

Figure 6 is a similar view taken through one of the feed rolls.

Referring now to the drawings, I5 designates a frame of any suitable construction and which is provided at its upper portion with a pair of bag clamping jaws I6 mounted upon a bracket Il and operable in the usual manner by a vertically shiftable rod I8. Bag carrying arms I9 are disposed lengthwise above the frame I5 and are normally supported upon rollers 20 which are arranged at the forward and rear ends of the machine, the bags adapted to enter at the forward end of the machine and are delivered therefrom at the rear end of the machine upon a downwardly inclined grating or apron 2|. The rollers 20 support the arms I9 substantially in horizontal position and the arms I9 are adapted at their forward ends for insertion in a bag against the bottom thereof for overturning the bag as the latter is held by the clamping jaws I 6 and by the forward movement of the arms I9.

The bag is adapted to be inserted on the clamping jaws I6 before the bag is reversed, and these jaws I6 are then opened by means of the operating member I8, one of the jaws I6 being disposed below the line of travel of the arms I9 and the other of the jaws I6 being disposed above the line of travel of the arms- I9.

The frame I5 is provided at a point spaced forwardly from the bracket I'I with a pair of transverse brushes 22, one disposed above the other, as shown in Figures 1, 3 and 4, and one of which is shown in detail in Figure 5.

Each brush 22 comprises an outer peripheral portion of soft fiber of any suitable character adapted for rubbing and brushing engagement against the exposed surface of the bag which is brought between the brushes. This outer fiber portion of the brush is mounted on a hub or hollow spindle 23 which may be provided at opposite ends with bushings or bearings 24 adapted to engage the adjacent brush shaft 25. The shafts 25 are mounted one above the other in bearings 2G which may be conveniently mounted upon Achannel rails 2l secured vertically at opposite sides of the frame l5. The lower brush 22 `has its shaft V25 projecting beyond its bearing 26 at one side of the machine and provided with a hand wheel 28 by means of which the brushes may be .jmanually turned. The throat between the 'brushes 22 is substantially in line with the arms i9 so that the latter in moving forwardly in the machine passes between the brushes 22. At one side of the machine each brush shaft 25 is provided with a sprocket wheel 29 over the upper portion of which extend the respective upper and lower runs of an endless drive chain 39.

At the rear end of the frame I5 is mounted a pair of feed rolls 3|. As shown in Figure 6, each feed roll 3| comprises an outer surface portion of rubber or like yieldable material to afford a gripping action on the bag and also to locally yield to any inequalities in the bag structure, such as at seams, hems or the like to grip the bag and feed it through the machine without cutting, tearing or otherwise injuring the bag. The outer surface of rubber is supported upon a pipe or tube 32 and the latter is provided at opposite ends with hub blocks 33 carrying coaxial spindles 34 projecting from opposite ends of the roll. The spindles 34 of the lower roll are mounted in xed bearings 35 on the frame l5 while the spindles 34 of the upper roll are mounted in vertically movable bearing blocks 36 disposed in a Vertical guideway 3l and normally urged downward by springs 38, as clearly shown in Figures 3 and 4.

The result is that the upper roll is yieldingly urged against the lower roll and when the arms I9 with the inverted bag thereon advance against the rolls the upper roll 3| rises to accommodate the thickness of the bag in the arms and the rubber surface portions of the rolls absorbs shock and adapts itself to inequalities in the thickness of the bag.

The spindles 34 of the feed rolls 3|, at said side of the frame I5, are provided with sprockety wheels 39 which receive at their under sides the respective upper and lower runs of said endless drive chain 3|). The rear end of the frame I5 is provided at said side with a channel bar 40 which extends upwardly beyond the throat between the drive rolls 3| and supports an idler sprocket 4| over which the rear end of the drive chain passes, the sprocket 4I being disposed above the lower portion of the upper sprocket 39 so that as the upper roll 3| rises and falls the endless drive chain will remain at all times in contact with the okupper roll sprocket 39 and thus constantly and continuously drive both of the feed rolls in all relative adjustments thereof,

The endless chain 30 has its upper and lower runs disposed in substantially parallel relation downwardly and forwardly from the sprockets 29 of the brushes 22 and engaged beneath idler sprockets 42 mounted upon the side of the frame l5 below the bracket the drive chain 30 being carried forwardly where its forward end passes over a drive sprocket 43 mounted on a drive shaft 44 driven from any suitable source of power.

In operation the arms |9 are advanced into the machine with the inverted bag thereover and, as shown in Figure 3, as the arms pass between the brushes 22 the inner walls of the bag which are aosliA'es turned outermost are engaged by the upper and lower brushes and thoroughly cleansed by a rubbing and brushing action incident to the yieldable outer surface of the brushes. The brushes are driven in a reverse direction to that of the advancement or feeding of the arms I9 so that the exposed inner walls of the bag are advanced gradually into position between the brushes as the bag is moved forwardly through the machine. This takes place during the turning action on the bag so that the bag is drawn taut over the arms I9 by the brushes during the brushing action and thus the bag is stretched into proper turned position and is completely turned during its passage through the machine by the action of these brushes.

The brushes therefore serve not only their function of brushing and cleaning the inner walls of` the bag but they also serve a function in the operation of the turning machine in that the brushes insure the complete overturning of the bag and the proper stretching of it before and as the bag enters and passes through the feed rolls 3 I As the arms |9 are somewhat free at their forward ends, they are susceptible to vibration and while they are supported to some extent on the rear supporting roll 20 they strike the bottom of the bag more or less against the surfaces of the feed rolls 3| and, in present used bag machines, this vibration frequently destroys the bags by cutting and tearing them. The relatively soft yieldable surfaces of the rolls 3| prevent this and thus protect the bags and at the same time effect a yielding gripping action on the bags and draw the same from the arms I9 without injury. The forward ends of the arms I9 may pass between the feed rollsv 3| without injury to the bags on account not only of the rubber surface portions of the rolls but also on account of the yielding support of the upper roll 3|. The springs 3B are properly tensioned to admit increase in the size of the throat between the feed rolls as the bag and arms project into the throat and the rolls are uniformly and constantly driven at all times incident to the peculiar arrangement of the drive chain 30. The idler sprockets 4| and 42 and the idler sprocket 45 disposed adjacent the lower feed roll sprocket 39, are so mounted on the side of the frame I5 as to maintain the drive chain in proper contact with the various sprockets to drive the brushes and the feed rolls in opposite directions and at all times during the Working of the machine.

The yielding surfaces of the brushes 22 is sucient to admit passage of the arms I9 with the inverted back thereon into the throat between the brushes so that a desired tension may be obtained against the bag. v

As will be seen in Figure 4 the brushes 23 and rollers 3| are spaced lengthwise of the frame by a substantial distance but less than the length of a bag. The bag turning arms |9, as shown in Figure 2, pass partly into the rollers 3|. Thus, a. bag is carried by the arms I9 well into the rollers 3| and at this point the greater part of the bag is free of the brushes so that they do. not oppose the feed of the bag through the rollers.

It is obvious that various changes and modications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims:-

What is claimed is:-

l. In a bag turning machine, a frame, a pair of arms on the frame for supporting a bag in turned position and adapted to be advanced into the frame, a pair of rotary brushes mounted on the frame in the path of the arms and having brushing surfaces for engagement with the bag on the arms, a pair of rolls mounted on the frame beyond the brushes for receiving the arms and the bag therebetween and having yieldable surface portions adapted to engage the bag and strip the same from the arms, yieldable means for mounting one of said feed rolls for movement toward or away from the other feed roll, said brushes and rolls having sprockets at one side of the machine, and an endless drive chain having their upper and lower runs engaging respectively over and beneath the sprockets of the brushes and rolls for driving the rolls to advance the bag and the brushes in an opposite direction to oppose the advance of the bag.

2. In a bag turning machine, a frame, a pair of rotary brushes mounted on the frame, a pair of rolls mounted on the frame and including a yieldable support for the upper roll, a pair of arms for receiving a turned mag thereover carried by the frame and movable between the brushes and the rolls, said brushes and rolls having at one side of the frame sprockets, and an endless drive chain mounted with the upper and lower runs thereof engaging over the tops of the sprockets of the brushes and Yengaging beneath the bottoms of the sprockets of the rolls for turning the rolls to advance the bag and the brushes in an opposite direction to oppose the advance of the bag.

3. In a bag turning machine, a frame, a pair of brushes mounted on the frame having sprockets at one side of the frame, a pair of rolls spaced from the brushes mounted on the frame and having sprockets at said sid-e of the frame, yieldable means for the upper roll to normally urge the same against the lower roll and admit separation of the rolls, an endless drive chain mounted on said side of the frame and engaging against the opposite upper and lower sides of the sprockets of the brushes and rolls for driving the rolls to advance the bag and the brushes in the opposite direction to oppose the advance of the bag, idler sprockets mounted on the frame and engaging said endless chain to maintain the same at all times in operative contact with the sprockets, and bag carrying arms movable on the frame for supporting a turned over bag to carry the same between said brushes and rolls.

4. In a bag-turning machine a frame, bag holding means on the frame, bag turning arms movably mounted on the frame for advancement against a bag on said holding means, a. pair of transverse rotatable brushes in the path of said arms beyond said holding means, a pair of feed rollers mounted on the frame a substantial distance beyond the said brushes, a yieldable tensioning device between one of said feed rollers and the frame, a sprocket on one end of each of said feed rollers, and means for driving said brushes in a direction opposing the advancement of said turning arms and for driving said rollers in the opposite direction, said driving means including an endless chain engaging the sprockets of the rollers.

5. In a bag-turning machine having a frame, and a pair of feed rollers mounted at one end of the frame; a yieldable mounting for one of said rollers to permit automatic adjustment of the space between said rollers, a pair of rotatable brushes mounted on the frame in line with said feed rollers, driving sprockets at the ends of the brushes and rollers, a bag holder on the frame beyond said brushes, a bag turner movable on th-e frame traveling against a bag on the holder and through the brushes and into the feed rollers, and an endless chain passing over the sprockets of the brushes and under the sprockets of the rollers to drive the brushes to oppose the advance of said bag turner and the rollers in the opposite direction, said yieldable mounting and chain drive permitting the bag turner to pass between the feed rollers without damage to bag or rollers.

6. In a bag-turning machine having a frame, bag holding means on the frame, bag turning arms movably mounted on the frame for advancement against a bag on said holding means, a pair of superimposed transverse brush rolls mounted on the frame in the path of said turning arms beyond said bag holding means, a pair of superimposed transverse feed rollers each having a sprocket at one end, a xed mounting on the frame for one of the feed rollers, a yieldable mounting on the frame for the other of said feed rollers, and means for driving said brush rolls in a direction opposing the advancement of said turning arms and for driving said feed rollers in a direction opposite to that of the brush rolls, said means including an endless chain engaging the sprockets of said rollers.

JACOB J. NEUMAN. GERALD R. GREENE. 

